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首页> 外文期刊>Catalysis science & technology >Green light (550 nm) driven tunable syngas synthesis from CO2 photoreduction using heterostructured layered double hydroxide/TiC photocatalysts
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Green light (550 nm) driven tunable syngas synthesis from CO2 photoreduction using heterostructured layered double hydroxide/TiC photocatalysts

机译：绿灯(550海里)驱动可调的合成气从二氧化碳合成光致还原作用用层状双氢氧化物/抽搐论文的

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摘要

Synthesis of syngas (CO, H-2) by photocatalytic reduction of CO2 and H2O represents an eco-friendly pathway for large-scale CO2 utilization for the production of chemical raw materials with high added value. However, the precise control of the CO : H-2 ratio from 1 : 1 to the stoichiometric ratio of 1 : 3 is a major challenge in the process of photocatalytic CO2 reduction, especially under long-wavelength irradiation (like green light of 550 nm). Herein, under visible light (lambda > 400 nm), a heterostructured layered double hydroxide nanosheets/TiC (denoted as LDH/TiC) photocatalyst was prepared and exhibited tunable syngas synthesis with different CO/H-2 ratios (from 1 : 1-1 : 3). More importantly, such performance can be well controlled even under green light irradiation (550 nm) in conjunction with a Ru-complex photosensitizer and triethanolamine (TEOA) as a sacrificial agent. Theory calculations revealed that the excellent performance came from the assembly between LDH and TiC, which could not only improve the charge transfer efficiency but also change the desorption energy of H-2, resulting in the precise tunable ratio of syngas. This work offers an excellent strategy to design photocatalysts for reducing CO2 to syngas for potential applications.
机译：通过光催化合成合成气(CO、h2)减少二氧化碳和水代表了环保的途径对大规模二氧化碳生产化学原料的利用率材料与高附加值。精确控制有限公司:2比1:1的化学计量比1:3是一个主要的挑战的过程中光催化二氧化碳减少,特别是在长波长550海里)的照射(如绿灯。在可见光(λ> 400海里),用层状双氢氧化物nanosheets /抽搐(表示为LDH /抽搐)光催化剂准备和可调合成气展出合成与不同的公司/ h2o比率(从1:1 - 1: 3)。更重要的是,这样的性能很好地控制甚至在绿灯照射在配合(550海里)Ru-complex光敏剂和三乙醇胺(TEOA)作为牺牲剂。计算结果表明,优秀来自LDH之间的装配性能和抽搐,这不仅可以提高电荷传输效率也改变解吸,氢的能量,导致的合成气的比例精确可调。一个优秀的战略设计论文为减少二氧化碳为潜在的合成气应用程序。

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